sh64: kernel: fix the compiling issue for process_64.c

The related 2 patches are for fixing the issue below:

The related errors:

CC arch/sh/kernel/process_64.o
arch/sh/kernel/process_64.c: In function ‘copy_thread’:
arch/sh/kernel/process_64.c:396:39: error: ‘fn’ undeclared (first use in this function) arch/sh/kernel/process_64.c:396:39: note: each undeclared identifier is reported only once for each function it appears in arch/sh/kernel/process_64.c:377:30: error: unused variable ‘regs’ [-Werror=unused-variable]
cc1: all warnings being treated as errors

--

 arch/sh/kernel/process_64.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)